Convert Kilogram to Gram
1 kilogram = 1,000 gram (g). For example, 10 kilogram = 10,000 gram and 100 kilogram = 100,000 gram. Type any value below to convert kilogram to gram both ways — it runs entirely in your browser.
Quick answer: Kilogram to Gram
1 Kilogram = 1,000 Gram (kg → g). To convert kilogram to gram, multiply by 1,000. To convert gram to kilogram, multiply by 0.001. The converter at the top does this instantly and both ways; the sections below give the formula, worked examples, a full conversion chart and answers to the most common kilogram-to-gram questions.
How to convert Kilogram to Gram
To convert kilogram to gram, multiply the number of kilogram by the conversion factor 1,000, because 1 kg = 1,000 g. The conversion is linear, so the same factor works for any value — whole numbers, decimals or fractions. For the reverse direction, 1 g = 0.001 kg, so you divide by 1,000 (or multiply by 0.001) to turn gram back into kilogram.
g = kg × 1,000 ·
kg = g × 0.001
- Write down the value you want to convert, in kilogram.
- Multiply it by 1,000.
- The result is the same area/length/quantity expressed in gram.
Kilogram to Gram — worked examples
Each row shows the exact arithmetic so you can follow the conversion step by step. For example, 5 kilogram is 5,000 gram because 5 kg × 1,000 = 5,000 g.
| Kilogram | Calculation | Gram |
|---|---|---|
| 1 kg | 1 kg × 1,000 = 1,000 g | 1,000 g |
| 2 kg | 2 kg × 1,000 = 2,000 g | 2,000 g |
| 3 kg | 3 kg × 1,000 = 3,000 g | 3,000 g |
| 5 kg | 5 kg × 1,000 = 5,000 g | 5,000 g |
| 7 kg | 7 kg × 1,000 = 7,000 g | 7,000 g |
| 10 kg | 10 kg × 1,000 = 10,000 g | 10,000 g |
| 12 kg | 12 kg × 1,000 = 12,000 g | 12,000 g |
| 15 kg | 15 kg × 1,000 = 15,000 g | 15,000 g |
| 20 kg | 20 kg × 1,000 = 20,000 g | 20,000 g |
| 25 kg | 25 kg × 1,000 = 25,000 g | 25,000 g |
| 50 kg | 50 kg × 1,000 = 50,000 g | 50,000 g |
| 100 kg | 100 kg × 1,000 = 100,000 g | 100,000 g |
Common Kilogram to Gram conversions
These are the kilogram-to-gram values people look up most often. Every figure is computed from the exact factor, so you can rely on them for quick reference:
- 1 kilogram = 1,000 gram
- 2 kilogram = 2,000 gram
- 2.5 kilogram = 2,500 gram
- 3 kilogram = 3,000 gram
- 4 kilogram = 4,000 gram
- 5 kilogram = 5,000 gram
- 6 kilogram = 6,000 gram
- 7 kilogram = 7,000 gram
- 8 kilogram = 8,000 gram
- 9 kilogram = 9,000 gram
- 10 kilogram = 10,000 gram
- 12 kilogram = 12,000 gram
- 15 kilogram = 15,000 gram
- 20 kilogram = 20,000 gram
- 25 kilogram = 25,000 gram
- 30 kilogram = 30,000 gram
- 50 kilogram = 50,000 gram
- 75 kilogram = 75,000 gram
- 100 kilogram = 100,000 gram
- 200 kilogram = 200,000 gram
- 500 kilogram = 500,000 gram
- 1000 kilogram = 1,000,000 gram
Kilogram to Gram conversion chart (both directions)
The chart below converts kilogram to gram and gram to kilogram side by side, so it works whichever way you need. 1 kilogram = 1,000 gram, and 1 gram = 0.001 kilogram.
| Kilogram → Gram | Gram → Kilogram |
|---|---|
| 0.25 kg = 250 g | 0.25 g = 0.00025 kg |
| 0.5 kg = 500 g | 0.5 g = 0.0005 kg |
| 1 kg = 1,000 g | 1 g = 0.001 kg |
| 2 kg = 2,000 g | 2 g = 0.002 kg |
| 3 kg = 3,000 g | 3 g = 0.003 kg |
| 4 kg = 4,000 g | 4 g = 0.004 kg |
| 5 kg = 5,000 g | 5 g = 0.005 kg |
| 6 kg = 6,000 g | 6 g = 0.006 kg |
| 7 kg = 7,000 g | 7 g = 0.007 kg |
| 8 kg = 8,000 g | 8 g = 0.008 kg |
| 9 kg = 9,000 g | 9 g = 0.009 kg |
| 10 kg = 10,000 g | 10 g = 0.01 kg |
| 12 kg = 12,000 g | 12 g = 0.012 kg |
| 15 kg = 15,000 g | 15 g = 0.015 kg |
| 20 kg = 20,000 g | 20 g = 0.02 kg |
| 25 kg = 25,000 g | 25 g = 0.025 kg |
| 30 kg = 30,000 g | 30 g = 0.03 kg |
| 40 kg = 40,000 g | 40 g = 0.04 kg |
| 50 kg = 50,000 g | 50 g = 0.05 kg |
| 75 kg = 75,000 g | 75 g = 0.075 kg |
| 100 kg = 100,000 g | 100 g = 0.1 kg |
| 150 kg = 150,000 g | 150 g = 0.15 kg |
| 200 kg = 200,000 g | 200 g = 0.2 kg |
| 250 kg = 250,000 g | 250 g = 0.25 kg |
| 500 kg = 500,000 g | 500 g = 0.5 kg |
| 1000 kg = 1,000,000 g | 1000 g = 1 kg |
Kilogram vs Gram: which is bigger?
A kilogram is the larger unit: one kilogram equals 1,000 grams. Put another way, you need 1,000 grams to make a single kilogram.
What is a Kilogram? History, origin and usage
The kilogram began in revolutionary France in 1795 as the mass of a litre of water at the temperature where water is densest. In 1889 that idea was replaced by a physical object: the International Prototype of the Kilogram, a platinum-iridium cylinder kept in a vault at Sèvres near Paris. For 130 years the kilogram was whatever that one lump of metal weighed. The problem was that the official copies slowly drifted apart from it by tens of micrograms, so on 20 May 2019 the definition was cut loose from the object and tied instead to a fixed value of the Planck constant.
The kilogram is the SI base unit of mass and the working weight unit for almost the whole world — shopping, medicine, freight, engineering and science. Every other unit on this page, metric or imperial, is defined by how many kilograms it equals, which is why the conversions here are exact rather than rounded.
It is the only SI base unit whose name carries a prefix built in ("kilo" + "gram"), a historical accident that means the SI prefix rules have to be applied to the gram instead. It was also the last base unit still defined by a man-made object, and the only one that could be scratched, cleaned or dropped.
What is a Gram? History, origin and usage
The gram was defined in 1795 as the mass of one cubic centimetre of water at the melting point of ice. It was meant to be the everyday unit, with the kilogram as a bulk multiple — but the kilogram turned out to be the more practical size for a physical standard, so the two swapped roles and the gram became the derived one.
Grams are the normal unit for food, recipes, spices, postage, jewellery and laboratory work — anything too small to weigh comfortably in kilograms. Nutrition labels almost everywhere give protein, fat and sugar in grams.
The gram was the base unit of the old CGS (centimetre-gram-second) system used in physics before SI took over. A gram is roughly the mass of a paperclip, or of one millilitre of water.
Convert 1 Kilogram to other units
It can help to see a kilogram next to the other units it is commonly compared with. One kilogram (kg) is equal to:
| 1 Kilogram equals | Unit |
|---|---|
| 1,000 g | Gram |
| 1,000,000 mg | Milligram |
| 1,000,000,000 µg | Microgram |
| 0.001 t | Tonne |
| 0.01 q | Quintal |
| 2.204623 lb | Pound |
| 35.27396 oz | Ounce |
| 0.157473 st | Stone |
| 0.001102311 ton (US) | Short ton |
| 0.0009842065 ton (UK) | Long ton |
| 32.15075 oz t | Troy ounce |
| 15,432.36 gr | Grain |
| 5,000 ct | Carat |
Convert 1 Gram to other units
One gram (g) is equal to:
| 1 Gram equals | Unit |
|---|---|
| 0.001 kg | Kilogram |
| 1,000 mg | Milligram |
| 1,000,000 µg | Microgram |
| 0.000001 t | Tonne |
| 0.00001 q | Quintal |
| 0.002204623 lb | Pound |
| 0.03527396 oz | Ounce |
| 0.000157473 st | Stone |
| 0.000001102311 ton (US) | Short ton |
| 0.0000009842065 ton (UK) | Long ton |
| 0.03215075 oz t | Troy ounce |
| 15.43236 gr | Grain |
| 5 ct | Carat |
Tips for converting Kilogram to Gram
- To go from kilogram to gram, multiply by 1,000; to go back, divide by 1,000 (or multiply by 0.001).
- For a quick mental estimate, remember that 1 kilogram ≈ 1,000 gram, so 10 kilogram ≈ 10,000 gram.
- The converter above keeps full precision; the tables round for readability, so use the tool for exact figures.
- Both fields update live as you type — change either side to convert in that direction.
How to use this Kilogram to Gram converter
Type a number into the Kilogram field and the equivalent in Gram appears instantly — there is no “convert” button to press and nothing is sent to a server, so it works offline once the page has loaded and is safe for any data. You can also type into the Gram field to convert the other way (gram to kilogram). Use the swap control to flip the two units, and copy the result with a single click. Because the calculation runs in your browser with full floating-point precision, the converter is more exact than the rounded figures shown in the reference chart above — use the chart for quick look-ups and the tool for precise work.
Accuracy and method
Every figure on this page — the formula, the worked examples, the conversion chart and the “convert to other units” tables — is computed from a single verified conversion factor (1 kg = 1,000 g), never copied from a hand-typed lookup table that could drift. That factor is derived from each unit’s definition in terms of a common base unit, and an automated check re-verifies all of the site’s factors on every update, so the numbers here stay correct over time. This matters for kilogram-to-gram conversions because a small rounding error in a published table compounds quickly at larger quantities; computing from the exact factor avoids that.
Sources
- BIPM — The International System of Units (SI Brochure) — the defining document for the SI, published by the International Bureau of Weights and Measures. It fixes the base unit that this conversion resolves to, which is why the factor here can be exact rather than approximate.
- NIST — Definitions of the SI base units — the US National Institute of Standards and Technology reference for the SI base units, used here as an independent cross-check on the base-unit definition.
Weight factors here are exact, anchored to the kilogram: the international pound is exactly 0.45359237 kg, a stone is 14 pounds, a short ton is 2,000 pounds and a long ton is 2,240, a grain is 1/7000 of a pound and a metric carat is exactly 200 mg. So the live tool and every number on this page always agree.
Frequently asked questions
- How many gram are in 1 kilogram?
- 1 kilogram = 1,000 gram (g). To convert any number of kilogram to gram, multiply by 1,000.
- How do I convert kilogram to gram?
- Multiply the number of kilogram by 1,000. For example, 10 kilogram = 10 × 1,000 = 10,000 gram, and 25 kilogram = 25,000 gram.
- How many kilogram are in 1 gram?
- 1 gram = 0.001 kilogram. So to convert gram back to kilogram, multiply by 0.001.
- What is the formula to convert kilogram to gram?
- gram = kilogram × 1,000. The reverse formula is kilogram = gram × 0.001.
- How much is 100 kilogram in gram?
- 100 kilogram = 100,000 gram. (And 1000 kilogram = 1,000,000 gram.)
- Which is bigger, a kilogram or a gram?
- A kilogram is larger: 1 kilogram = 1,000 gram.
- Is this kilogram to gram converter accurate?
- Yes — every value is computed from the exact 1,000 g per kg factor (not rounded look-up tables), and the factors are re-verified automatically on every update.
- Can I convert gram to kilogram too?
- Yes. The converter works both ways — enter a value in either field. 1 gram = 0.001 kilogram.